判断当前系统是32位还是64位
注意：我要的是当前系统的类型，而不是处理器的类型
比如说，我们有可能拿个64位的处理器来装32位的系统，也有可能是拿32的处理器，经过虚拟化，装了64位的系统
我想要判断的不是处理器的类型，而是所装的系统的类型。
网上有看到很多帖子，如：
BOOL IsWow64()
{
typedef BOOL (WINAPI *LPFN_ISWOW64PROCESS) (HANDLE, PBOOL);
LPFN_ISWOW64PROCESS fnIsWow64Process;
BOOL bIsWow64 = FALSE;
fnIsWow64Process = (LPFN_ISWOW64PROCESS)GetProcAddress( GetModuleHandle(_T("kernel32")), "IsWow64Process");
if (NULL != fnIsWow64Process)
{
fnIsWow64Process(GetCurrentProcess(),&bIsWow64);
}
return bIsWow64;
}
也有人对这段程序提出质疑（详见http://blog.csdn.net/fanner01/article/details/6562924）
而以下这段代码，我怀疑判断的是处理器的类型，而不是系统的类型
BOOL Is64bitSystem()
{
SYSTEM_INFO si;
GetNativeSystemInfo(&si);
if (si.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64 ||
si.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_IA64 )
{
return TRUE;
}
else
{
return FALSE;
}
}
请教大家以下，有没有一个比较靠谱的方法可以判断当前系统是32位还是64位？谢谢了！
[解决办法]
lz关于怀疑是处理器类型是正确的 确实是处理器
[解决办法]
GetVersionEx获取系统的信息，msdn上面有例子。
[解决办法]
以下代码是vs2008 msdn 上的例子代码，搜GetVersionEx 函数
然后找Getting the System Version
#include <windows.h>#include <tchar.h>#include <stdio.h>#define BUFSIZE 80typedef void (WINAPI *PGNSI)(LPSYSTEM_INFO);int __cdecl _tmain(){ OSVERSIONINFOEX osvi; SYSTEM_INFO si; PGNSI pGNSI; BOOL bOsVersionInfoEx; ZeroMemory(&si, sizeof(SYSTEM_INFO)); ZeroMemory(&osvi, sizeof(OSVERSIONINFOEX)); // Try calling GetVersionEx using the OSVERSIONINFOEX structure. // If that fails, try using the OSVERSIONINFO structure. osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX); if( !(bOsVersionInfoEx = GetVersionEx ((OSVERSIONINFO *) &osvi)) ) { osvi.dwOSVersionInfoSize = sizeof (OSVERSIONINFO); if (! GetVersionEx ( (OSVERSIONINFO *) &osvi) ) return FALSE; } // Call GetNativeSystemInfo if supported // or GetSystemInfo otherwise. pGNSI = (PGNSI) GetProcAddress( GetModuleHandle(TEXT("kernel32.dll")), "GetNativeSystemInfo"); if(NULL != pGNSI) pGNSI(&si); else GetSystemInfo(&si); switch (osvi.dwPlatformId) { // Test for the Windows NT product family. case VER_PLATFORM_WIN32_NT: // Test for the specific product. if ( osvi.dwMajorVersion == 6 && osvi.dwMinorVersion == 0 ) { if( osvi.wProductType == VER_NT_WORKSTATION ) printf ("Windows Vista "); else printf ("Windows Server \"Longhorn\" " ); } if ( osvi.dwMajorVersion == 5 && osvi.dwMinorVersion == 2 ) { if( GetSystemMetrics(SM_SERVERR2) ) printf( "Microsoft Windows Server 2003 \"R2\" "); else if( osvi.wProductType == VER_NT_WORKSTATION && si.wProcessorArchitecture==PROCESSOR_ARCHITECTURE_AMD64) { printf( "Microsoft Windows XP Professional x64 Edition "); } else printf ("Microsoft Windows Server 2003, "); } if ( osvi.dwMajorVersion == 5 && osvi.dwMinorVersion == 1 ) printf ("Microsoft Windows XP "); if ( osvi.dwMajorVersion == 5 && osvi.dwMinorVersion == 0 ) printf ("Microsoft Windows 2000 "); if ( osvi.dwMajorVersion <= 4 ) printf ("Microsoft Windows NT "); // Test for specific product on Windows NT 4.0 SP6 and later. if( bOsVersionInfoEx ) { // Test for the workstation type. if ( osvi.wProductType == VER_NT_WORKSTATION && si.wProcessorArchitecture!=PROCESSOR_ARCHITECTURE_AMD64) { if( osvi.dwMajorVersion == 4 ) printf ( "Workstation 4.0 " ); else if( osvi.wSuiteMask & VER_SUITE_PERSONAL ) printf ( "Home Edition " ); else printf ( "Professional " ); } // Test for the server type. else if ( osvi.wProductType == VER_NT_SERVER || osvi.wProductType == VER_NT_DOMAIN_CONTROLLER ) { if(osvi.dwMajorVersion==5 && osvi.dwMinorVersion==2) { if ( si.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_IA64 ) { if( osvi.wSuiteMask & VER_SUITE_DATACENTER ) printf ( "Datacenter Edition " "for Itanium-based Systems" ); else if( osvi.wSuiteMask & VER_SUITE_ENTERPRISE ) printf ( "Enterprise Edition " "for Itanium-based Systems" ); } else if ( si.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64 ) { if( osvi.wSuiteMask & VER_SUITE_DATACENTER ) printf ( "Datacenter x64 Edition " ); else if( osvi.wSuiteMask & VER_SUITE_ENTERPRISE ) printf ( "Enterprise x64 Edition " ); else printf( "Standard x64 Edition " ); } else { if( osvi.wSuiteMask & VER_SUITE_DATACENTER ) printf ( "Datacenter Edition " ); else if( osvi.wSuiteMask & VER_SUITE_ENTERPRISE ) printf ( "Enterprise Edition " ); else if ( osvi.wSuiteMask & VER_SUITE_BLADE ) printf ( "Web Edition " ); else printf ( "Standard Edition " ); } } else if(osvi.dwMajorVersion==5 && osvi.dwMinorVersion==0) { if( osvi.wSuiteMask & VER_SUITE_DATACENTER ) printf ( "Datacenter Server " ); else if( osvi.wSuiteMask & VER_SUITE_ENTERPRISE ) printf ( "Advanced Server " ); else printf ( "Server " ); } else // Windows NT 4.0 { if( osvi.wSuiteMask & VER_SUITE_ENTERPRISE ) printf ("Server 4.0, Enterprise Edition " ); else printf ( "Server 4.0 " ); } } } // Test for specific product on Windows NT 4.0 SP5 and earlier else { HKEY hKey; TCHAR szProductType[BUFSIZE]; DWORD dwBufLen=BUFSIZE*sizeof(TCHAR); LONG lRet; lRet = RegOpenKeyEx( HKEY_LOCAL_MACHINE, TEXT("SYSTEM\\CurrentControlSet\\Control\\" "ProductOptions"), 0, KEY_QUERY_VALUE, &hKey ); if( lRet != ERROR_SUCCESS ) return FALSE; lRet = RegQueryValueEx( hKey, TEXT("ProductType"), NULL, NULL, (LPBYTE) szProductType, &dwBufLen); RegCloseKey( hKey ); if( (lRet != ERROR_SUCCESS) || (dwBufLen > BUFSIZE*sizeof(TCHAR)) ) return FALSE; if ( lstrcmpi( TEXT("WINNT"), szProductType) == 0 ) printf( "Workstation " ); if ( lstrcmpi( TEXT("LANMANNT"), szProductType) == 0 ) printf( "Server " ); if ( lstrcmpi( TEXT("SERVERNT"), szProductType) == 0 ) printf( "Advanced Server " ); printf( "%d.%d ", osvi.dwMajorVersion, osvi.dwMinorVersion ); } // Display service pack (if any) and build number. if( osvi.dwMajorVersion == 4 && lstrcmpi( osvi.szCSDVersion, TEXT("Service Pack 6") ) == 0 ) { HKEY hKey; LONG lRet; // Test for SP6 versus SP6a. lRet = RegOpenKeyEx( HKEY_LOCAL_MACHINE, TEXT("SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\" "Hotfix\\Q246009"), 0, KEY_QUERY_VALUE, &hKey ); if( lRet == ERROR_SUCCESS ) printf( "Service Pack 6a (Build %d)\n", osvi.dwBuildNumber & 0xFFFF ); else // Windows NT 4.0 prior to SP6a { _tprintf( TEXT("%s (Build %d)\n"), osvi.szCSDVersion, osvi.dwBuildNumber & 0xFFFF); } RegCloseKey( hKey ); } else // not Windows NT 4.0 { _tprintf( TEXT("%s (Build %d)\n"), osvi.szCSDVersion, osvi.dwBuildNumber & 0xFFFF); } break; // Test for the Windows Me/98/95. case VER_PLATFORM_WIN32_WINDOWS: if (osvi.dwMajorVersion == 4 && osvi.dwMinorVersion == 0) { printf ("Microsoft Windows 95 "); if (osvi.szCSDVersion[1]=='C' || osvi.szCSDVersion[1]=='B') printf("OSR2 " ); } if (osvi.dwMajorVersion == 4 && osvi.dwMinorVersion == 10) { printf ("Microsoft Windows 98 "); if ( osvi.szCSDVersion[1]=='A' || osvi.szCSDVersion[1]=='B') printf("SE " ); } if (osvi.dwMajorVersion == 4 && osvi.dwMinorVersion == 90) { printf ("Microsoft Windows Millennium Edition\n"); } break; case VER_PLATFORM_WIN32s: printf ("Microsoft Win32s\n"); break; } return TRUE; }